Voros, owner of Voros Plumbing, aided “Today” national investigative correspondent Jeff Rossen with a report on plumbers who take advantage of unsuspecting homeowners.

The report aired on NBC Thursday morning.

“It was a benefit for the consumer,” said of the segment.

Responding to reports that plumbers — licensed and unlicensed — had been taking advantage of customers, NBC producers planned a sting.

They used a house in Basking Ridge in North Jersey and had the female homeowner call in 10 plumbers to see how they would fix a “problem” with a home water heater.

Voros spent three days in January working with the NBC crew. At the rented house, Voros, a master plumber, inspected the hot water heater and found it in good working order. Two other master plumbers inspected it, too, and came to the same verdict.

To make it look like there was a problem, a screw was turned on a drain valve to allow a tiny stream of water to drip out. A real problem? No. Any good plumber would see all it took was a tiny turn of a screw to stop the drip.

The house was outfitted with hidden cameras and microphones. In an upstairs room , monitors were set up to watch the plumbers via the hidden cameras in the basement examine the heater. Voros carefully eyed every move to see how they would handle the situation.

Four of the plumbers said costly repairs, up to $2,000, were needed. Those four were all wrong, Voros said.

As those plumbers talked with the homeowner, Rossen, Voros and the NBC camera crews converged on the basement to confront them.

“It was great to see the first guy come in — a fellow licensed plumber — and (assess the problem correctly) and disheartening to see others tell her she needed something she didn’t,” Voros said.

Voros is chairman of the Board of Examiners of New Jersey Master Plumbers, the organization which reviews complaints about plumbers from consumers and has the power to revoke plumbers’ licenses.

Voros said he was impressed with the NBC crew’s attention to detail, “to make sure everything was recorded and everything done legally.”

Voros volunteered his time for the project.

“This was all to benefit the consumer,” he said. “They have to be educated . If you have a (plumbing) problem, gather your thoughts and get three estimates.”